alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS MSF Meterpreter Default User Agent"; flow:established,to_server; http.user_agent; bsize:46; content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.1|3b 20|Windows NT|29|"; fast_pattern; reference:url,blog.didierstevens.com/2015/03/16/quickpost-metasploit-user-agent-strings; classtype:bad-unknown; sid:2021060; rev:4; metadata:created_at 2015_05_06, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_10;)